[lldb] [llvm] [mlir] [Support] Remove virtual functions from formatv (PR #207516)

[Alexis Engelke via llvm-commits]

================
@@ -107,26 +107,26 @@ static llvm::Error FormatImpl(DataStack &data) {
     }
     using namespace llvm::support::detail;
     auto arg = data[data.size() - num_args + r.Index];
-    auto format = [&](format_adapter &&adapter) {
+    auto format = [&](FormatFunctorRef &&adapter) {
       llvm::FmtAlign Align(adapter, r.Where, r.Width, r.Pad);
       Align.format(os, r.Options);
     };
 
     if (auto s = std::get_if<std::string>(&arg))
-      format(build_format_adapter(s->c_str()));
+      format(FormatFunctor<const char *>(s->c_str()));
----------------
aengelke wrote:

Added a template deduction guide for this.

https://github.com/llvm/llvm-project/pull/207516